Is "over flashing" actually a thing?

[spencer_L&KC]

Like the title says, is over flashing actually something to be cautious of? Or is it a myth? Obviously leaving the shirt under the flash for extended times isnt great, but when it comes to making sure to keep a print tacky, how important is it really?

Has anyone here ever seen top colors not adhere to a base, and maybe even come off, not from under curing, but from flashing too long?

Has anyone here ever seen a second pass of white come off the first pass?

I have been printing since 2011, printing professionally since 2018. I have never once seen a top color or second pass of white detach from a base, and I know for sure that at some point I "over flashed" a print or two in that time. Still though, no issues with top coats adhering to the base. Another user on here mentioned in another thread that "over flashing" could be a myth, so I am very curious to hear what some of the other pros think on the subject. I am not a newbie, but posted here so actual newbies can find and learn from this thread. 

So what say you? Thanks for reading!

[prozyan]

As far as ink failure on top colors, you'll ruin the shirt long before you see any issues there.

The only time over-flashing is an issue can be on some high polyester items, as excess heat exacerbates dye migration.  But that is easily solved with any decent ink.

[mk162]

Yes, it's absolutely a thing.  Over flashing can lead to what look like white dots in your print. they only show up after the oven, or even when you pull your shirts.